Hangar 9 Alpha 40 ARF Assembly Manual page 8


Step 3
Position an engine mount rail on the fuselage. Thread an
8-32 blind nut on the screw. Note that the prongs on the
blind nut will go into the backside of the firewall to keep
them from rotating. The nuts are not to be tightened at this
time so the mount can be positioned for your engine. The
bolts wil be tightened once the engine has been secured to
the mounting rails.
8

Step 4
Place a #4 washer on each of the four 4-40 x 1-inch socket
head bolts. Slide the screws through the holes in the engine
mount flange.

Step 5
Place the engine on the mounting rails. The screws will go
through the holes in the rails. Thread a 4-40 locknut on each
screw. The nuts are only finger-tight at this time.
Hangar 9 Alpha 40 ARF Assembly Manual